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Development of a system configuration for a solar powered hydrogen facility using fuzzy logic control

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第11期14卷 822-834页

作者： Ying-tai LOONG Mahidzal DAHARI hwa-jen YAP Hue-yee chong Department of Mechanical Engineering Faculty of Engineering University MalayaKuala Lumpur 50603 Malaysia

Solar energy is a natural resource which can be harnessed to provide clean electricity for hydrogen production ***, this technology is not widely used because of control issues, particularly for hydrogen refuelling stations. At present,direct or DC-DC converter couplings are the most common system configurations for hydrogen refuelling stations. However, these system configurations are costly and suffer from gas shortage at hydrogen refuelling stations. Furthermore, the hydrogen produced by such system configurations varies considerably depending on the levels of solar radiation. In order to address these issues, a new system configuration is proposed, incorporating the feedback signal of the storage level in the control system. The photovoltaic(PV) system, electrolyzer, and storage tank are integrated with a fuzzy logic controller(FLC) to determine the backup current compensation for electrolyzer operation in order to obtain the minimum power required for hydrogen production. The proposed FLC is constructed with three input variables which are the PV current, hydrogen storage level, and the battery state of charge. The rules-based fuzzy inference process is based on the proposed configuration which combines the advantages of direct and DC-DC converter coupling configurations. The simulation results show that the proposed configuration offers better adaptability to variable radiation conditions compared to other methods. This gives a more promising option for ensuring the adequacy of hydrogen supply at hydrogen refuelling stations.

关键词： Hydrogen energy Solar energy Hydrogen refueling facility Fuzzy logic

Monitoring of PON System Using Compound Surveillance Technique

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Journal of Electronic Science and Technology 2015年第2期13卷 169-173页

作者： Sun-chien Ko Hsiu-Jung Chuang Si-chong Chen Chih-Yih Wang Sheng-Fwu Lin Telecommunication Laboratories Chunghwa Telecom Co.Ltd.

A passive optical network（PON） monitoring system combined light pulse and frequency sweep techniques is proposed and verified in a field test. The light pulse surveys over the all whole network and the frequency sweep are used to investigate any fault in the link. The field test is performed with 4 PONs. Each PON is monitored at 4 ports, one is the splitter port and the other three are arbitrary chosen multiple optical units（ONUs）. All the tested PONs are monitored in turns once per hour. Faults at the feeder and branch fiber have been observed in this field test and have been analyzed with the monitoring system.

关键词： verified arbitrary monitored splitter branch chosen reflective turns restoration realistic

Effects of Cordyceps militaris extract on angiogenesis and tumor growth

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Acta Pharmacologica Sinica 2004年第5期25卷 115-123页

作者： hwa-seung YOO,Jang-woo SHIN,Jung-hyo CHO,Chang-gue SON,Yeon-weol LEE,Sang-yong PARK,chong-kwan CHO Daejeon University Daejeon 301-724 Department of East-West Cancer Center College of Oriental Medicine Daejeon University Daejeon 301-724 Department of East-West Cancer Center College of Oriental Medicine Daejeon University Daejeon 301-724 Department of East-West Cancer Center R&D Lab of Bulrolife Co Ltd Daejeon Korea College of Oriental Medicine Daejeon University Daejeon 301-724 Institute ofTraditional Medicine and Bioscience Daejeon University Daejeon 301-724 Department of East-West Cancer Center College of Oriental Medicine

AIM: To evaluate the effects of Cordyceps militaris extract (CME) on angiogenesis and tumor growth. METHODS:Human umbilical vein endothelial cells (HUVEC), HT1080, and B16-F10 cells were used. DNA fragment, angio-genic related gene expressions (MMPs, bFGF, VEGF, etc), capillary tube formation, wound healing in vitro, tumorgrowth in vivo were measured. RESULTS: CME inhibited growth of HUVECs and HT1080 (P<0.01). CME 100and 200 mg/L reduced MMP-2 gene expression in HT1080 cells by 6.0 % and 22.9 % after 3-h and 14.9 % and32.8 % after 6-h treatment. CME did not affect MMP-9 gene expression in B16-F10 melanoma cells. CME 100 and200 mg/L also reduced bFGF gene expression in HUVECs by 22.2 % and 41.3 %. CME inhibited tube formation ofendothelial cells in vitro and in vivo. CME repressed the growth of B16-F10 melanoma cells in mice compared withcontrol group (P<0.05). CONCLUSION: CME has antiangiogenetic properties.

关键词： Cordyceps militaris angiogenesis human umbilical vein endothelial cells HT1080 cells B16-F10cells matrix metalloproteinases basic fibroblast growth factor

Machine Learning-Assisted Fabrication of PCBM-Perovskite Solar Cells with Nanopatterned TiO_(2)Layer

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Energy & Environmental Materials 2024年第4期7卷 223-230页

作者： Siti Norhasanah Sanimu hwa-Young Yang Jeevan Kandel Ye-chong Moon Gangasagar Sharma Gaudel Seung-Ju Yu Yong Ju Kim Sejung Kim Bong-Hyun Jun Won-Yeop Rho Graduate School of Integrated Energy-AI Jeonbuk National University567 Baekje-daeroDeokjin-guJeonju-siJeollabuk-do 54896Korea School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology(UNIST)50 UNIST-gilEonyang-eupUlju-gunUlsan 44919Korea Department of Herbal Medicine Resources College of Environmental and Bioresource SciencesJeonbuk National UniversityIksan 54596Korea School of Chemical Engineering Jeonbuk National University567 BaekjedaeroDeokjin-guJeonju-siJeollabuk-do 54896Korea Department of Bioscience and Biotechnology Konkuk University120 Neungdong-roGwangjin-guSeoul 05029Korea School of International Engineering and Science Jeonbuk National University567 Baekje-daeroDeokjin-guJeonju-siJeollabuk-do 54896Korea

To unlock the full potential of PSCs,machine learning(ML)was implemented in this research to predict the optimal combination of mesoporous-titanium dioxide(mp-TiO_(2))and weight percentage(wt%)of phenyl-C_(61)-butyric acid methyl ester(PCBM),along with the current density(J_(sc)),open-circuit voltage(V_(oc)),fill factor(ff),and energy conversion efficiency(ECE).Then,the combination that yielded the highest predicted ECE was selected as a reference to fabricate PCBM-PSCs with nanopatterned TiO_(2)***,the PCBM-PSCs with nanopatterned TiO_(2)layers were fabricated and characterized to further understand the effects of nanopatterning depth and wt%of PCBM on ***,the highest ECE of 17.338%is achieved at 127 nm nanopatterning depth and 0.10 wt%of PCBM,where the J_(sc),V_(oc),and ff are 22.877 mA cm^(-2),0.963 V,and 0.787,*** measured J_(sc),V_(oc),ff,and ECE values show consistencies with the ML ***,these findings not only revealed the potential of ML to be used as a preliminary investigation to navigate the research of PSCs but also highlighted that nanopatterning depth has a significant impact on J_(sc),and the incorporation of PCBM on perovskite layer influenced the V_(oc)and ff,which further boosted the performance of PSCs.

关键词： machine learning nanopatterning PCBM perovskite solar cells prediction

Value of video-assisted thoracoscopic surgery in the diagnosis and treatment of pulmonary tuberculoma:53 cases analysis and review of literature

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第5期10卷 375-379页

作者： Kun-Yen HSUDepartment of Thoracic Medicine Chia-Yi Christian Hospital hwa-Chan LEE chien-Chih OU Shi-ping LUH Department of Surgery Saint Martin De Porres Hospital Department of Thoracic Medicine Saint Martin De Porres Hospital Institute of Bioinformational Technology National Chiao-Tung University

Tuberculoma of the lung is one of manifestations in tuberculosis and usually presents as a solitary pulmonary nodule(SPN).It is difficult to differentiate tuberculoma from SPN by other benign or malignant *** present,the crucial role of video-assisted thoracoscopic surgery(VATS) in diagnosis and treatment of pulmonary diseases has been well ***,we reported 53 patients undergoing VATS resection for tuberculomas in our *** postoperative mortality was found and only two patients experienced prolonged air-leakage(>7 d) and two had minor wound infections that were recovered after anti-tuber-culosis or antibiotic ***-tuberculosis chemotherapy from 6 to 12 months was routinely used *** conclude that VATS is a satisfactory tool for the diagnosis and treatment of tuberculoma and can also establish a reliable diagnosis for all patients with SPNs.

关键词： Tuberculoma Video-assisted thoracoscopic surgery (VATS) Anti-tuberculosis treatment

Fuzzy-based risk prioritization for a hydrogen refueling facility in Malaysia

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第8期14卷 834-834页

作者： Hue-yee chong Mahidzal Dahari hwa-jen Yap Ying-tai Loong 1. Department of Mechanical Engineering Faculty of Engineering University Malaya Kuala Lumpur 50603 Malaysia

Hydrogen is starting to be mentioned as an alternative fuel to replace the fossil fuel in future transportation applications due to its characteristics of zero greenhouse gas emission and high energy efficiency. Before hydrogen fuel and its facilities can be introduced to the public, relevant safety issues and its hazards must be assessed in order to avoid any chance of injury or loss. While a traditional risk assessment has difficulty in prioritizing the risk of failure modes, this paper proposes a new fuzzy-based risk evaluation technique which uses fuzzy value to prioritize the risk of various scenarios. In this study, the final risk of each failure modes was prioritized by using the MATLAB fuzzy logic tool box with a combination of two assessments. The first assessment was concerned with the criteria which affected the actual probability of *** assessment considered the availability of the standard that was applied to prevent the likelihood of the scenario occurring. On the other hand, the second assessment was focused on evaluating the consequence of the failure by taking into account the availability of detection and the complexity of the failure rather than only the severity of the scenarios. A total of 87 failure scenarios were identified using failure modes and effect analysis(FMEA) procedures on hydrogen refueling station models. Fuzzy-based assessments were performed through risk prioritizing various failure scenarios with a fuzzy value(0 to 1) and risk level(low, medium, and high)while a traditional risk assessment approach presented the risks only in forms of level(low, medium, and/or high). Availability of the fuzzy value enabled further prioritizing on the risk results that fell in the same level of risk. This study concluded that fuzzy-based risk evaluation is able to further prioritize the decisions when compared with a traditional risk assessment method.

关键词：风险评估方法模糊值加氢站马来西亚设施优先级模糊逻辑工具箱故障模式

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Antimicrobial activity and synergism of Sami-Hyanglyun-hwan with ciprofloxacin against methicillin-resistant Staphylococcus aureus

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Asian Pacific Journal of Tropical Medicine 2015年第7期8卷 536-540页

作者： Jang-Gi Choi Ji-Young Choi Su-Hyun Mun Ok-hwa Kang Preeti Bharaj Dong-Won Shin Myong-Soo chong Dong-Yeul Kwon Department of Oriental Pharmacy College of Pharmacy Wonkwang University Wonkwang Oriental Medicines Research Institute Center of Excellence in Infectious Disease Research Department of Biomedical Sciences Paul L. Foster School of Medicine Texas Tech University Health Sciences Center Department of Third Medicine Professional Graduate School of Oriental Medicine Wonkwang University BK21 Plus Team Professional Graduate School of Oriental Medicine Wonkwang University Department of Oriental Medicine Resources Sunchon National University

Objective: To investigate the antibacterial activity of SHHextracted with either water or ethanol against methicillin-resistant Staphylococcus aureus(MRSA) and combinatory antimicrobial effect with ciprofloxacin(CIP) by time kill assay and checkerboard dilution test. Methods: The antibacterial activity determined by broth dilution method indicated that the antibacterial activity of Sami-Hyanglyun-hwan(SHH) water extract(SHHW) and SHH ethanol extract(SHHE) ranged from 250 to 2000 μg/m L and 125 to 1000 μg/m L against MRSA, respectively. Results: In the checkerboard method, the combinations of SHHE with CIP had a partial synergistic or synergistic effect against MRSA. The time-kill curves showed that a combined SHHE and CIP treatment reduced the bacterial counts dramatically after 24 h. Conclusions: The present study demonstrates the therapeutic ability of SHHE against MRSA infections.

关键词： Sami-Hyanglyun-hwan Methicillin-resistant Staphylococcus aureus Ciprofloxacin Synergy

An Overview of Current Oriental Medicine Herbal Cancer Research in Korea

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Chinese Journal of Integrative Medicine 2011年第4期17卷 251-256页

作者： Jeungwon Yoon hwa-Seung Yoo Yeon-Weol Lee chong-Kwan Cho East-West Cancer Center Dunsan Oriental Medical Hospital of Daejeon UniversityDaejeonRepublic of Korea

Cancer is the number one cause of death in Korea with annual mortalities of 69 *** suggests one in every four Koreans will end up getting cancer at some point in their life *** these persistent threats,strive for cancer cure is continued. Ten years of Korea＇s oriental medicine herbal research on cancer have been reviewed. Researches between the years of 2000 and 2010 are analyzed in terms of their published year,study types,tested subjects,testing measures,cancer types,and *** the past ten years,cancer researches have blossomed from null to full in Korean peninsula, and further development is much anticipated in the next ten years to come.

关键词： oriental medicine herbal research cancer Korea

Anti-angiogenic effects of the water extract of HangAmDan(WEHAD),a Korean traditional medicine

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Science China(Life Sciences) 2011年第3期54卷 248-254页

作者： BANG Ji-Young KIM Kyung-Soon KIM Eung-Yoon YOO hwa-Seung LEE Yeon-Weol CHO chong-Kwan CHOI YoungJin JEONG Hyun-Ja KANG In-Cheol InnoPharmasceen Inc. Hoseo UniversityAsan 336-795Republic of Korea East-West Cancer Center Dunsan Oriental Medical Hospital of Daejeon UniversityDaejeon 302-122Republic of Korea BioChip Research Center Hoseo UniversityAsan 336-795Republic of Korea Department of Biological Science College of Natural ScienceHoseo UniversityAsan 336-795Republic of Korea

We investigated the anti-angiogenic effects of the water extract of HangAmDan (WEHAD),which is a crude extract of nine Korean medicinal substances of animal and plant *** human umbilical vein endothelial cells,WEHAD significantly inhibited bFGF-induced proliferation,adhesion,migration,and capillary tube *** used an antibody array to perform an analysis of signaling proteins,which showed up-regulated expression of various proteins including RAD51,RAD52,and p73,and down-regulated expression of *** vessel formation in a chick chorioallantoic membrane (CAM) treated with WEHAD was markedly reduced in length compared with a PBS-treated control *** results suggest that inhibition of angiogenesis by WEHAD may be the mechanism of action for the anti-cancer effects of HAD.

关键词： angiogenesis HangAmDan WEHAD antibody array HUVEC